Question: What is the archipelagic state whose head of government is Joko Widodo?
Paraphrase: Tell the name of country, located in an archipelago, which is governed by Joko Widodo.
SPARQL (Wikidata):  select distinct ?sbj where { ?sbj wdt:P6 wd:Q3318231 . ?sbj wdt:P31 wd:Q13107770 } 
Answer: Indonesia